/*
 * Copyright (C) 2019 ByteDance Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.bytedance.scene.animation.interaction.evaluator;

import android.animation.TypeEvaluator;
import android.graphics.Matrix;

public class MatrixEvaluator implements TypeEvaluator<Matrix> {
    private float[] mTempStartValues = new float[9];
    private float[] mTempEndValues = new float[9];
    private Matrix mTempMatrix = new Matrix();

    @Override
    public Matrix evaluate(float fraction, Matrix startValue, Matrix endValue) {
        startValue.getValues(mTempStartValues);
        endValue.getValues(mTempEndValues);
        for (int i = 0; i < 9; i++) {
            float diff = mTempEndValues[i] - mTempStartValues[i];
            mTempEndValues[i] = mTempStartValues[i] + (fraction * diff);
        }
        mTempMatrix.setValues(mTempEndValues);

        return mTempMatrix;
    }
}